K210 ISP Programming

  • What is ISP protocol for the K210, that occurs over the ISP_RX and ISP_TX pins? I'm interested in using the K210 device for a project, so I'm evaluating how to build the hardware. In the process, I'm trying to figure out how the ISP process works. I think I have the general idea, from kflash.py, but I need more information. Is there a document that defines ISP commands and replies? For example, what is the format for the ISP_MEMORY_READ command? Is there a similar command for reading the flash device? Is the source for the ISP_PROG binary available? Thanks!